what are the first steps in doing a good model?
Preparation, preparation, preparation:
Grab the instruction sheet and "groke" it real good. Get familiar with the order of assembly. Don't freelance construction, keep the sheet handy during the build processs, and refer to it often.
Remove the mold release oils. This will help any paint applied to adhear to the plastic. While the parts are still on the trees, I soak them down with Castrol degreaser, then rinse this off by holding them under hot running water. Set them aside, and let air dry for a day or two.
The next step is to remove all of the major assemblies off the trees, trim any excess sprue material off, and check the fit of the parts. File, sand, trim as needed to achieve as flush a fit as possible (especially where the fuselage, and wing halfs meet).
Use a liquid cement for plastic, and apply it with a small slim paint brush (not the one supplied with the bottle of cement). Don't go over board, a little goes a long ways.
Some areas will need to be painted prior to assemlby (cockpit interiors, wheelwells, etc).
Go to your local Hobby shop, or art supply store and check their line of Badger airbrushes. A good one can be had for around 30 bucks. A good air supply is a little more expensive. I don't like the canned air as it tends to freeze the airbrush with extended use. Practice on scrap parts first until you get the hang of it.
Most important tip: Expect failure! Don't get PO'd (tough to do), but learn from your mistakes. Don't be afraid to experiment with different methods and products.
And watch out for Revell product decals, they tend to distintegrate in water. Some folks say you need to clear coat them with laquer, but I say screw that. Tamiya is my brand of choice. Simple construction, excellent detail, with good fit and finish.
Enjoy!